<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2025/3/18
  Time: 15:05
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>

<%@ taglib prefix="c" uri="jakarta.tags.core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

使用EL表达式:</br>
用户名： ${username}
密 码： ${password}
</br>

stu对象:
ID:${s.id}
学号:${s.num}
姓名:${s.name}
</br>

empty 判空</br>
a是否为空：${empty a} </br>
b是否为空：${empty b}

</body>
</html>
